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Public Health

Flu Visits Hit Record Levels as Drifted H3N2 Variant Drives Early U.S. Surge

CDC warns the season has not peaked, with vaccines still reducing severe cases despite a partial mismatch.

Flu Season Accelerates as H3N2 Subclade K Becomes Dominant in the U.S.

Flu Surges Nationwide as H3N2 Subclade K Dominates, Straining Hospitals Before Holidays

New H3N2 ‘Subclade K’ Drives Early Flu Surges as U.S. Officials Urge Vaccination